U.S. patent application number 12/462103 was filed with the patent office on 2010-02-04 for host apparatus for supporting bluetooth and method therefor.
This patent application is currently assigned to Samsung Electronics Co., Ltd.. Invention is credited to Hark-Soo Kim, Hyang-Bok Lee.
Application Number | 20100029208 12/462103 |
Document ID | / |
Family ID | 41608856 |
Filed Date | 2010-02-04 |
United States Patent
Application |
20100029208 |
Kind Code |
A1 |
Lee; Hyang-Bok ; et
al. |
February 4, 2010 |
Host apparatus for supporting bluetooth and method therefor
Abstract
A host apparatus for wirelessly communicating with a headset by
Bluetooth.RTM. is provided. An audio Digital Signal Processor (DSP)
performs Pulse Code Modulation (PCM) on sound source data when a
type of the headset is a mono headset. The audio DSP performs
Universal Asynchronous Receiver Transmitter (UART) modulation on
the sound source data when a type of the headset is not a mono
headset. A Bluetooth.RTM. communication unit transmits the data
modulated by the audio DSP to the headset.
Inventors: |
Lee; Hyang-Bok; (Suwon-si,
KR) ; Kim; Hark-Soo; (Yongin-si, KR) |
Correspondence
Address: |
DOCKET CLERK
P.O. DRAWER 800889
DALLAS
TX
75380
US
|
Assignee: |
Samsung Electronics Co.,
Ltd.
Suwon-si
KR
|
Family ID: |
41608856 |
Appl. No.: |
12/462103 |
Filed: |
July 29, 2009 |
Current U.S.
Class: |
455/41.3 ;
381/77 |
Current CPC
Class: |
H04R 2420/07 20130101;
H04R 1/1091 20130101; H04R 5/033 20130101; H04R 2420/05
20130101 |
Class at
Publication: |
455/41.3 ;
381/77 |
International
Class: |
H04B 7/00 20060101
H04B007/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 31, 2008 |
KR |
10-2008-0075321 |
Claims
1. A host apparatus for wirelessly communicating with a headset by
Bluetooth.RTM., comprising: an audio Digital Signal Processor (DSP)
for performing Pulse Code Modulation (PCM) on sound source data
when a type of the headset is a mono headset; and a Bluetooth.RTM.
communication unit for transmitting the data modulated by the audio
DSP to the headset.
2. The host apparatus of claim 1, wherein the audio DSP performs
Universal Asynchronous Receiver Transmitter (UART) modulation on
the sound source data when a type of the headset is not a mono
headset.
3. The host apparatus of claim 2, wherein the audio DSP comprises:
a PCM modulator for PCM-modulating the sound source data when a
type of the headset is a mono headset; and a UART transceiver for
UART-modulating the sound source data when a type of the headset is
not a mono headset.
4. The host apparatus of claim 1, further comprising a memory.
5. The host apparatus of claim 4, wherein the memory is configured
to store the sound source data and outputting the stored sound
source data to the audio DSP.
6. The host apparatus of claim 1, wherein the host apparatus is
configured to support a call function.
7. The host apparatus of claim 1, wherein the host apparatus is any
one of a mobile phone, a Personal Digital Assistant (PDA), a laptop
computer, and an MPEG Audio Layer-3 (MP3) player.
8. The host apparatus of claim 1, wherein the sound source data is
any one of an MP3 file, a Window Media Audio (WMA) file, and a Wave
(WAV) file.
9. A method for wirelessly communicating with a headset by
Bluetooth.RTM. in a host apparatus, comprising: performing Pulse
Code Modulation (PCM) on sound source data when a type of the
headset is a mono headset; and transmitting the PCM-modulated data
to the headset.
10. The method of claim 9, further comprising: performing Universal
Asynchronous Receiver Transmitter (UART) modulation on the sound
source data when a type of the headset is not a mono headset; and
transmitting the UART-modulated data to the headset.
11. The method of claim 9, further comprising determining whether a
type of the headset is a mono headset.
12. The method of claim 9, wherein the sound source data is sound
source data stored in a memory.
13. The method of claim 9, wherein the host apparatus is configured
to support a call function.
14. The method of claim 9, wherein the host apparatus is any one of
a mobile phone, a Personal Digital Assistant (PDA), a laptop
computer, and an MPEG Audio Layer-3 (MP3) player.
15. The method of claim 9, wherein the sound source data is any one
of an MP3 file, a Window Media Audio (WMA) file, and a Wave (WAV)
file.
16. A Bluetooth.RTM. system comprising: a headset used for
listening to sound source data received by Bluetooth; and a host
apparatus for performing Pulse Code Modulation (PCM) on sound
source data and transmitting the modulated sound source data to the
headset when a type of the headset is a mono headset.
17. The Bluetooth.RTM. system of claim 16, wherein the host
apparatus performs Universal Asynchronous Receiver Transmitter
(UART) modulation on the sound source data when a type of the
headset is not a mono headset.
18. The Bluetooth.RTM. system of claim 16, wherein the host
apparatus is any one of a mobile phone, a Personal Digital
Assistant (PDA), a laptop computer, and an MPEG Audio Layer-3 (MP3)
player.
19. The Bluetooth.RTM. system of claim 16, wherein the host
apparatus stores the sound source data is sound source data in a
memory.
20. The Bluetooth.RTM. system of claim 16, wherein the sound source
data is any one of an MP3 file, a Window Media Audio (WMA) file,
and a Wave (WAV) file.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S) AND CLAIM OF PRIORITY
[0001] The present application claims the benefit under 35 U.S.C.
.sctn.119(a) of a Korean Patent Application filed in the Korean
Intellectual Property Office on Jul. 31, 2008 and assigned Serial
No. 10-2008-0075321, the entire disclosure of which is hereby
incorporated by reference.
TECHNICAL FIELD OF THE INVENTION
[0002] The present invention relates generally to a host apparatus
for supporting Bluetooth.RTM.. More particularly, the present
invention relates to a method and host apparatus for providing
sound source data to a Bluetooth.RTM. mono headset.
BACKGROUND OF THE INVENTION
[0003] Bluetooth.RTM. is one of the wireless interface standard
specifications for connection between a portable device and other
peripheral devices. The portable device corresponds to a mobile
phone, a portable Personal Computer (PC) and the like. The
peripheral devices include all devices serving as a network access
point. Modules supporting Bluetooth.RTM. are advantageous in that
they are small in size, low in price, and consume less power.
[0004] Recently, with the development of mobile terminal-related
technologies and multimedia services, functions offered by mobile
terminals are diversified. Additionally, sound source services
provided by the mobile terminals are also increased in diversity.
Accordingly, there is a tendency that a category of the mobile
terminals where the sound source services are provided is extended
and various types of mobile terminals provide Bluetooth.RTM.
communication as a basic function. As a result, wireless
communication is possible between a Bluetooth.RTM. wireless headset
and the mobile terminal so that a user may readily transmit and
receive information of the mobile terminal using the headset.
[0005] However, the conventional mono headset has a limitation in
providing various multimedia services. Commonly, it is not possible
for the mono headset to normally replay sound source data since it
cannot demodulate the data that is modulated by a transmission
scheme for supporting a stereo headset. Thus, a user of the
low-priced mono headset that is conveniently carried by the user
for a voice call purpose cannot listen to the sound source data. As
a result, the user may not listen to even linguistic sound source
data that does not need high sound quality, as well as the
high-sound quality music.
[0006] A mono headset, which has recently been produced and
distributed in the market, has a Bluetooth.RTM. module for
supporting a stereo headset to allow the user to listen to sound
source data. However, such a product should necessarily have a
built-in Bluetooth.RTM. module for supporting the stereo headset in
order to perform Bluetooth.RTM. communication, significantly
increasing its implementation cost.
SUMMARY OF THE INVENTION
[0007] To address the above-discussed deficiencies of the prior
art, it is a primary aspect of the present invention to provide a
host apparatus for allowing a user to listen to sound source data
that he could not listen to conventionally, using a mono headset
supporting Bluetooth.RTM., and a method there for.
[0008] Another aspect of the present invention provides a host
apparatus for modulating sound source data that cannot be listened
to with a mono headset, to allow a user to listen to the sound
source data using a mono headset supporting Bluetooth.RTM., and a
method there for.
[0009] Further another aspect of the present invention provides a
host apparatus for Pulse Code Modulation (PCM)-modulating sound
source data that cannot be listened to with a mono headset and
transmitting the modulated sound source data to a mono headset
supporting Bluetooth.RTM., and a method there for.
[0010] Yet another aspect of the present invention provides a host
apparatus for changing a scheme of modulating sound source data
according to a type of a headset supporting Bluetooth.RTM., and a
method there for.
[0011] According to one aspect of the present invention, there is
provided a host apparatus for wirelessly communicating with a
headset by Bluetooth.RTM.. The apparatus includes an audio Digital
Signal Processor (DSP) for performing PCM on sound source data when
a type of the headset is a mono headset, and a Bluetooth.RTM.
communication unit for transmitting the data modulated by the audio
DSP to the headset.
[0012] According to another aspect of the present invention, there
is provided a method for wirelessly communicating with a headset by
Bluetooth.RTM. in a host apparatus. The method includes performing
PCM on sound source data when a type of the headset is a mono
headset, and transmitting the PCM-modulated data to the
headset.
[0013] According to further another aspect of the present
invention, there is provided a Bluetooth.RTM. system including a
headset used for listening to sound source data received by
Bluetooth.RTM., and a host apparatus for performing PCM on sound
source data and transmitting the modulated sound source data to the
headset when a type of the headset is a mono headset.
[0014] Other aspects, advantages, and salient features of the
invention will become apparent to those skilled in the art from the
following detailed description, which, taken in conjunction with
the annexed drawings, discloses exemplary embodiments of the
invention.
[0015] Before undertaking the DETAILED DESCRIPTION OF THE INVENTION
below, it may be advantageous to set forth definitions of certain
words and phrases used throughout this patent document: the terms
"include" and "comprise," as well as derivatives thereof, mean
inclusion without limitation; the term "or," is inclusive, meaning
and/or; the phrases "associated with" and "associated therewith,"
as well as derivatives thereof, may mean to include, be included
within, interconnect with, contain, be contained within, connect to
or with, couple to or with, be communicable with, cooperate with,
interleave, juxtapose, be proximate to, be bound to or with, have,
have a property of, or the like; and the term "controller" means
any device, system or part thereof that controls at least one
operation, such a device may be implemented in hardware, firmware
or software, or some combination of at least two of the same. It
should be noted that the functionality associated with any
particular controller may be centralized or distributed, whether
locally or remotely. Definitions for certain words and phrases are
provided throughout this patent document, those of ordinary skill
in the art should understand that in many, if not most instances,
such definitions apply to prior, as well as future uses of such
defined words and phrases.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] For a more complete understanding of the present disclosure
and its advantages, reference is now made to the following
description taken in conjunction with the accompanying drawings, in
which like reference numerals represent like parts:
[0017] FIG. 1 illustrates a structure of a host apparatus according
to an exemplary embodiment of the present invention; and
[0018] FIG. 2 illustrates a process of replaying and outputting
sound source data to a Bluetooth.RTM. headset according to an
exemplary embodiment of the present invention.
[0019] Throughout the drawings, the same drawing reference numerals
will be understood to refer to the same elements, features and
structures.
DETAILED DESCRIPTION OF THE INVENTION
[0020] FIGS. 1 through 2, discussed below, and the various
embodiments used to describe the principles of the present
disclosure in this patent document are by way of illustration only
and should not be construed in any way to limit the scope of the
disclosure. Those skilled in the art will understand that the
principles of the present disclosure may be implemented in any
suitably arranged mobile communications device.
[0021] The terms and words used in the following description and
claims are not limited to the bibliographical meanings, but, are
merely used by the inventor to enable a clear and consistent
understanding of the invention. Accordingly, it should be apparent
to those skilled in the art that the following description of
exemplary embodiments of the present invention are provided for
illustration purpose only and not for the purpose of limiting the
invention as defined by the appended claims and their
equivalents.
[0022] It is to be understood that the singular forms "a," "an,"
and "the" include plural referents unless the context clearly
dictates otherwise. Thus, for example, reference to "a component
surface" includes reference to one or more of such surfaces.
[0023] Before a detailed description of the invention is given, it
is to be understood that the term `host` as used herein refers to a
device that provides sound source data and/or a voice call signal
to a headset by performing Bluetooth communication with the
headset. The host may include not only mobile terminals such as a
mobile phone, a Personal Digital Assistant (PDA), a laptop computer
and an MPEG Audio Layer-3 (MP3) player, but also a desk top
computer that is difficult to carry and a car Audio/Video (A/V)
system as long as they can perform Bluetooth communication with the
headset. In the following description, a mobile communication
terminal will be given as an example of a host apparatus for
convenience purpose only.
[0024] A Bluetooth.RTM. headset, an audio input/output device of a
Bluetooth.RTM. host apparatus, is wirelessly coupled and can
provide audio data while on the move. The headset can be roughly
classified into a stereo headset and a mono headset.
[0025] Moreover, the term `sound source data` as used herein
indicates that the data is not a voice call signal that a host
apparatus receives with a Radio Frequency (RF) unit, and the sound
source data may include files recorded in various formats by a
voice recorder, in addition to an MP3 file, a Window Media Audio
(WMA) file and/or a Wave (WAV) file.
[0026] Wireless communication performed between a host apparatus
and a headset is herein assumed to be Bluetooth.RTM. wireless
communication.
[0027] FIG. 1 illustrates a structure of a host apparatus 100
according to an exemplary embodiment of the present invention.
[0028] A host apparatus 100 includes an audio Digital Signal
Processor (DSP) 110 for modulating and controlling sound source
data and/or a call signal, a memory 120 for storing sound source
data and outputting the sound source data upon request, an RF unit
130 for transmitting and receiving a call signal, an audio vocoder
140 for analyzing and synthesizing a call signal into an electrical
signal, and a Bluetooth.RTM. (BT) communication unit 150 for
encoding modulated sound source data with a Sub Band Codec (SBC)
codec and transmitting the encoded sound source data to a
headset.
[0029] However, the host apparatus 100, if it does not support a
call function, may not include the audio vocoder 140 and the RF
unit 130. An example of the host apparatus 100 supporting the call
function may include a mobile phone, a PDA and the like. An example
of the host apparatus 100 not supporting the call function may
include a laptop computer, an MP3 player and the like. This
classification is merely given by way of example, and the decision
should be made depending on whether the host apparatus has a voice
call function.
[0030] In addition, when replayed sound source data is not the data
stored in the memory 120 of the host apparatus 100, the host
apparatus 100 may not include the memory 120. There are several
possible examples of excluding the memory 120. For example, the
host apparatus 100 may not include the memory 120 when the sound
source data received in a streaming form through the RF unit 130 is
replayed by the audio DSP 110. Also, the host apparatus 100 may not
include the memory 120, when an external memory is connected to the
host apparatus 100 and sound source data stored in the external
memory is directly replayed by the audio DSP 110 without being
stored in the host apparatus 100.
[0031] The audio DSP 110 controls the overall operation of
modulating sound source data. The audio DSP 110 may include a
Universal Asynchronous Receiver Transmitter (UART) transceiver 112
and a PCM modulator 114. The audio DSP 110 controls to transmit
sound source data stored in the memory 120 to the headset. The
audio DSP 110 selectively controls its operation according to a
type of a connected headset. For example, the audio DSP 110
performs UART modulation and transmission for a stereo headset, and
PCM modulation and transmission for a mono headset.
[0032] The UART transceiver 112 UART-modulates the replayed sound
source data to support a transfer rate of a minimum of 112 Kbps,
and transmits the modulated sound source data to the BT
communication unit 150.
[0033] The PCM modulator 114 PCM-modulates the replayed sound
source data with a PCM scheme by which a mono headset can also
demodulate the sound source data, and transfers the modulated sound
source data to the BT communication unit 150.
[0034] The memory 120 may be composed of a program memory and a
data memory. The program memory may store programs for controlling
an overall operation of the host apparatus 100, and a program for
controlling an operation of the audio DSP 110 according to an
exemplary embodiment of the present invention. The data memory
stores data generated during execution of the above programs and
sound source data, and outputs the data upon request.
[0035] The RF unit 130 serves to transmit and receive call signals.
The RF unit 130 includes an RF transmitter (not shown) for
up-converting a frequency of a transmission signal and amplifying
the up-converted signal, and an RF receiver (not shown) for
low-noise-amplifying a received signal and down-converting a
frequency of the amplified signal.
[0036] The audio vocoder 140 may constitute a codec, and the codec
includes a data codec for processing packet data, and the like, and
an audio codec for processing an audio signal such as voice. The
audio vocoder 140 has a function of converting and replaying a
digital audio signal received from the RF unit 130 into an analog
audio signal using the audio codec and transferring the analog
audio signal to the audio DSP 110, and a function of receiving,
from the audio DSP 110, a call signal that is generated from a
microphone of the headset and received at the host apparatus 100,
and converting the received call signal into a digital audio signal
using the audio codec to transmit the digital audio signal by means
of the RF unit 130.
[0037] The BT communication unit 150, which is connected to a
Bluetooth.RTM. wireless communication unit (not shown) included in
the headset, performs Bluetooth.RTM. wireless communication so that
the headset may exchange data with the host apparatus 100.
[0038] With reference to FIG. 1, a description will be made of a
process of modulating and transmitting sound source data according
to an exemplary embodiment of the present invention.
[0039] When there is a replay request for sound source data, the
conventional host apparatus 100 UART-modulates replayed sound
source data. UART, described below, is a transmission scheme that
can support a sound quality equivalent to that of an MP3 file.
Advanced Audio Distribution Profile (A2DP) is a profile that
enables a user to listen not only to a voice call signal, but also
to sound source data that is communicated by UART. Therefore, a
stereo headset with A2DP can output a stereo sound as well as a
mono sound.
[0040] On the other hand, a mono headset mostly includes only
Headset Profile (HSP) and Hands Free Profile (HFP), without A2DP.
Therefore, the mono headset can enable only a voice call based on a
PCM data line.
[0041] After the UART modulation, the host apparatus 100 encodes
the modulated data with an SBC codec. In Bluetooth.RTM., SBC is
used as a standard codec. That is, regardless of a type of
modulated audio data, the host apparatus 100 encodes the audio data
with SBC, which is the Bluetooth.RTM. standard codec, and transmits
the encoded audio data to the Bluetooth.RTM. headset, and the
headset decodes the SBC-encoded audio data.
[0042] After the encoding with an SBC codec, the host apparatus 100
transmits the SBC-encoded audio data to the Bluetooth.RTM. headset
using Bluetooth.RTM. wireless communication.
[0043] Therefore, the sound source data transmitted using UART can
be replayed by only a stereo headset and a mono headset with
A2DP.
[0044] In accordance with an exemplary embodiment of the present
invention, when a type of the headset is a stereo headset, the host
apparatus 100 UART-modulates and encodes sound source data and
transmits the sound source data in the conventional manner (see a
path R_a in FIG. 1). However, when a type of the headset is a mono
headset, the audio DSP 110 in the host apparatus 100 PCM-modulates
the sound source data and delivers the modulated sound source data
to the BT communication unit 150, and the BT communication unit 150
encodes the PCM-modulated sound source data with an SBC codec and
transmits the encoded sound source data to the Bluetooth.RTM.
headset (see a path R_b in FIG. 1). As a result, the mono headset
without A2DP can replay the sound source data based on a PCM data
line.
[0045] In case of the host apparatus 100 supporting a call
function, the audio vocoder 140 vocodes a call signal received via
the RF unit 130, the audio DSP 110 PCM-modulates the vocoded call
signal and delivers the modulated call signal to the BT
communication unit 150, and the BT communication unit 150 encodes
the PCM-modulated call signal with an SBC codec and transmits the
encoded call signal to the headset (see a path R_c in FIG. 1).
[0046] A comparison will be made between UART and PCM modulation
schemes, by which the audio DSP 110 in the host apparatus 100
provides sound source data to a stereo headset.
[0047] A general transfer rate of UART ranges from a minimum of 112
Kbps to a maximum of 3 Mbps. Conversely, in case of PCM, a sampling
rate at which a voice signal can be restored is about 8 KHz, and
general PCM data used in a commercial Bluetooth.RTM. module is
composed of eight (8) bits. As a result, a transfer rate of PCM is
64 Kbps.
[0048] In case of MP3, which is representative sound source data,
the data is composed of sixteen (16) bits, and if a sampling rate
of 8 KHz is applied, a transfer rate of 128 Kbps is required. If
UART supporting a high transfer rate is used, there is no sound
quality problem since the required transfer rate (or higher) of MP3
is supported. However, if the data is transmitted after being
PCM-modulated, it should undergo down sampling due to a limit (64
Kbps) of the transfer rate, resulting in a sound quality loss of
MP3.
[0049] However, when listening to linguistic sound source data is
intended, replay at a high sound quality is not required, and the
mono headset enables listening to sound source data such as MP3
without the need to additionally include hardware and upgrade
software. Thus, the sound quality loss is worth enduring.
[0050] With reference to FIG. 2, a detailed description will be
made of an operation of transmitting and outputting sound source
data to a mono headset in the host apparatus 100.
[0051] FIG. 2 illustrates a process of replaying and outputting
sound source data to a Bluetooth.RTM. headset according to an
exemplary embodiment of the present invention.
[0052] An exemplary embodiment of the present invention will be
described in detail with reference to both FIGS. 1 and 2.
[0053] A process is included that sets a headset in the host
apparatus 100 before transmission of sound source data. Steps 200
through 240 represent a setting process, while steps 250 through
290 correspond to a process of replaying, modulating and outputting
sound source data.
[0054] When there is a connection request for a headset, the host
apparatus 100 determines in step 200 whether the connection request
is a connection request for a headset registered therein. A process
of making the connection request for a headset includes i) a method
of requesting the connection by a headset, and ii) a method of
requesting the connection by the host apparatus 100. The former
method can be achieved by turning on power of the headset by the
user, and the latter method can be realized by activating a
connection request function provided in the host apparatus 100 by
the user.
[0055] If it is determined in step 200 that the connection request
is a connection request for a registered headset, the host
apparatus 100 sets up a connection to the headset in step 240. The
connection setup process includes a process of setting whether a
type of the headset is a stereo headset or a mono headset.
[0056] However, if it is determined in step 200 that the connection
request is a connection request for an unregistered headset, the
host apparatus 100 determines in step 210 whether there is a
request for initial search. The presence/absence of a request for
initial search can be determined by receiving an input from a user.
Optionally, if the connection request is a connection request for
an unregistered headset in step 200, the host apparatus 100 may
automatically perform the next operation without the determination
process, considering that there is a request for initial
search.
[0057] If it is determined in step 210 that there is no request for
initial search, the host apparatus 100 returns to step 200 where it
determines again whether the connection request is a connection
request for a registered headset. However, if there is a request
for initial search in step 210, the host apparatus 100 performs
initial search in step 220. The initial search process includes a
process of registering information about the headset in the host
apparatus 100 and a process of setting a result (`success` or
`fail`) of the initial search.
[0058] After step 220, the host apparatus 100 determines the result
of the initial search in step 230. If the result is `success`, the
host apparatus 100 returns to step 200 where it determines again
whether the connection request is a connection request for a
registered headset. However, if the result is `fail`, the host
apparatus 100 returns to step 210 and waits for a request for
initial search.
[0059] After completing the connection setup in step 240, the host
apparatus 100 determines in step 250 whether there is a replay
request for sound source data. If there is no replay request, the
host apparatus 100 returns to step 200 and waits in the process of
setting up a connection to the headset. However, if there is a
replay request for sound source data, the host apparatus 100
proceeds to the next step.
[0060] If there is a replay request for sound source data, the host
apparatus 100 begins replaying sound source data in step 260.
[0061] In step 270, the host apparatus 100 determines whether a
type of the headset to which it will output the replayed sound
source data is a mono headset.
[0062] If it is determined in step 270 that a type of the headset
is a mono headset, the audio DSP 110 PCM-modulates the replayed
sound source data and outputs the modulated sound source data to
the headset in step 280. However, if a type of the headset is not a
mono headset, the audio DSP 110 UART-modulates the replayed sound
source data and outputs the modulated sound source data to the
headset in step 290. The PCM modulation and the UART modulation can
be performed by the PCM modulator 114 and the UART transceiver 112,
respectively.
[0063] The headset, which has received the data output through the
Bluetooth wireless communication, outputs the received data.
[0064] As is apparent from the foregoing description, the present
invention, though it brings about a loss of sound quality, enables
listening to musical sound source data and linguistic sound source
data without installing separate additional modules even with a
mono headset which is easy to carry and use, compared with the
stereo headset. Therefore, a user of the mono headset can
conveniently use the headset and benefit from a new function added
without an increase in cost.
[0065] Although the present disclosure has been described with an
exemplary embodiment, various changes and modifications may be
suggested to one skilled in the art. It is intended that the
present disclosure encompass such changes and modifications as fall
within the scope of the appended claims.
* * * * *